MacBook not hearing you?
You may need to replace the microphone.
This is a replacement microphone for the Retina MacBook Pro..
All parts tested and working just like they were when you bought your MacBook..
Part Numbers: 923-0100.
Printed Number: 821-1571-A.
<li class="maclist-li"><h4>Compatible with : </h4>
<ul>
Pro Retina 15 (A1398, Mid 2012/ Early 2013/ Late 2013).